Shiri Appleby And Jon Shook Welcome A Baby Girl!

The Rosewell alum and her partner, Jon Shook , welcomed a beautiful baby girl on Saturday, March 23! Mama to be gushed to Us Weekly, "She's heaven. I'm beyond thrilled!"

The sweet new bundle's debut was a surprise for mom and dad, who opted not to find out baby's sex until she was born. Of her decision not to know if they were waiting on a he (or a she!), Shiri said, "It really made the whole pregnancy a heightened excitement because you just don't know what it's going to be."

The proud parents-to-be even decorated baby's nursery using a monochromatic color scheme, complete with a chandelier!

Since the cat's officially out of the bag and we know mom gave birth to a healthy, happy baby girl, there's no word on what they named their newest addition. We could venture to make some baby girl name guesses, but that would ruin the fun, wouldn't it?

Shiri, also a guest star on Girls and Chicago Fire, announced her pregnancy in December 2012, just five months after she and Shook got engaged on a trip to Italy. Throughout her pregnancy, Appleby sung her husband-to-be's praises for being a "calming influence" on her. She said, "When you see this guy going to all the doctor's appointments with you, and you tell him you're feeling a certain way, and two minutes later he's looked it up on the internet to tell you that it's normal, you realize that you're really starting a family with somebody. There's no way to look at that person and not be more in love." Go Jon! We love to see a daddy-to-be involved in mama's pregnancy!

Now, the family of three is looking to enjoy their first few months together, before the wedding bells start ringing. Shiri said, "We're planning on doing a big wedding after the baby is born." Can't wait to see how baby girl Shook looks strutting her newborn stuff down the aisle!